They serve as an alternative to more expensive or supply-restricted IR materials such as germanium (Ge) or zinc selenide (ZnSe).
They allow IR optical systems (thermal imaging, IR sensing, remote sensing) with good performance and potentially lower cost or weight.
Because of the moldability, for production or custom lens solutions they can provide flexibility.
Thermal imaging cameras (for surveillance, industrial, environmental).
IR spectroscopy and sensing, gas detection.
Aerospace/defense IR optics, night vision.
IR laser optics or beam shaping in MWIR/LWIR ranges.
| | | |
|
|---|---|---|---|---|
| Specification | LGSS13F3828LIR | LGSS25F2519LIR | LGSS19F2519LIR | LGSS19F3828LIR |
| Effective Focal Length (EFL) | 13 mm | 25 mm | 19 mm | 19 mm |
| Detector / Sensor | 384 × 288 (12 µm) | 256 × 192 (12 µm) | 256 × 192 (12 µm) | 384 × 288 (12 µm) |
| F-Number (F#) | 0.9 | 1.0 | 1.0 | 1.0 |
| Field of View (FOV H × V × D) | 25.2° × 20.2° × 15.1° | 7° × 5.2° | 9.22° × 6.93° | ~14° ±0.4° × 10° ±0.3° (H × V approximate) |
| Wavelength Range | 8–12 µm | 8–12 µm | 8–14 µm | 8–12 µm |
| Transmittance | > 88% | > 90% | > 90% | > 90% |
| Front Lens Coating | DLC-like coating | DLC-like coating | HD coating | DLC-like coating |
| Focus Type | Fixed focus | Manual focus | Manual focus | Manual focus |
| Focus Distance | 0.5 m → ∞ | 3 m → ∞ | 1 m → ∞ | 0.5 m → ∞ |
| Athermalizing | Optical athermalized | Optical athermalized | Non-optical athermalization | Optical athermalized |
| Sealing | Front-end IP67 | Front-end IP67 | Front-end IP67 | Front-end IP67 |
| Operating Temperature | −40 °C ~ +80 °C | −40 °C ~ +80 °C | −40 °C ~ +80 °C | −40 °C ~ +80 °C |
| Weight | < 50 g | < 80 g | < 80 g | < 57 g |
| Appearance Grade | 80–50 | 80–50 | 80–50 | 80–50 |
| Thread / Screw Interface | — | Passes HARO ring gauge measurement | — | Passes HARO ring gauge measurement |
| Remarks | RoHS 2.0 | RoHS 2.0 | — | — |
| | | ||
|---|---|---|---|---|
| Specification | LGSS50F6451LIR | LGSS35F6451LIR | LGSS25F3828LIR | |
| Effective Focal Length (EFL) | 50 mm | 35 mm | 25 mm | |
| Detector / Sensor | 640 × 512 (12 µm) | 640 × 512 (12 µm) | 384 × 288 (12 µm) | |
| F-Number (F#) | 1.0 | 1.0 | 1.0 | |
| Field of View (FOV) | 11.19° × 8.73° × 7° | 12.4° ± 0.4° × 9.9° ± 0.3° × 8° | 13.12° × 10.52° × 7.9° | |
| Wavelength Range | 8–12 µm | 8–12 µm | 8–12 µm | |
| Transmittance | > 90% | > 88% | > 88% | |
| Front Lens Coating | DLC-like coating | DLC-like coating | DLC-like coating (front element) | |
| Focus Type | Manual focus | Manual focus | Manual focus | |
| Focus Distance | 0.5 m → ∞ | 3 m → ∞ | 3 m → ∞ | |
| Athermalizing | Non-optical athermalization | Non-optical athermalization | Non-athermalized | |
| Sealing | Front-end IP67 | Front-end IP67 | Front-end IP67 | |
| Operating Temperature | −40 °C ~ +80 °C | −40 °C ~ +80 °C | −40 °C ~ +80 °C | |
| Weight | < 138 g | < 110 g | < 52 g | |
| Appearance Grade | 80–50 | 80–50 | 80–50 | |
| Thread / Screw Interface | Passes HARO ring gauge measurement | Passes HARO ring gauge measurement | — | |